From patchwork Sat Dec 14 03:10:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Chamberlain X-Patchwork-Id: 13908263 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 944C417BA0; Sat, 14 Dec 2024 03:10:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734145860; cv=none; b=HNGm8YBifu1YP+dv0xH5j/nuthycCFCvZtDJ6qAXXBWU8UINzQGw+t9vUCDWD5EII2Z1BJzQa5l7b5LjJnDTVdsTOsDfnJVtUIvGDa11stCtrvj/oYgsweLvIrs6iitAJGOvqajYDKg5+94QdSY/QwmarYqkW81qnmsOtyUINls= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734145860; c=relaxed/simple; bh=P3uVfLlVLJfHe4TSb4QwF1TtpfSmrcrLSBF0vRF6L7U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AuWxW44nlSOTV4BV1Rcc7y4PJ61/xqdOCIhMPkvwIp3123AQeSOQMBLa58M86jVv+VX2TaUcpevNzF2soltlrdKI7w6Q1Jq1/1iVL/cCuutyMy3wiKNF4qmfdHMvJgJQKHrporNUphQbi946dvB5sqzk4h2CQ92mBUWS4dlyqok= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=kernel.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=qL6vJdTy; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="qL6vJdTy" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=nLfCbW88XZtUGGKLjWBTHyDCe42vAPNXKRBtJR7DxnY=; b=qL6vJdTyzDGrY9BTzxUAOzoxWR GmyxjXs/ypIzQ4OBwJwjxzVHxTYl5WowwA8PlpzdvxsYCfAWKCxVKGzklNbFg+j9lyRrusBf2H2bo GLkVMnOTVZV/lpZd85GFZ1MVi81ANkvcUeR+JJE+WC+Wr3Z0gWG3fCONYfibpZ6l3jyduDgskVKBw zGXlDz4JQevtASwNKCWNnNAOsApI5OkuvhXNNNIaNtVIY0GOanrmRiewmyM4XTWoW+VYaF9Ch6GO/ jAb+ekAcuFvILM50r3oh8PDu2OVvOax56B8d0fV1YdR3Auj0Fd26/gnSmPf68M1AcX68Sws/msj8r Mx/t0qRA==; Received: from mcgrof by bombadil.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1tMIYO-00000005c3p-05r5; Sat, 14 Dec 2024 03:10:52 +0000 From: Luis Chamberlain To: willy@infradead.org, hch@lst.de, hare@suse.de, dave@stgolabs.net, david@fromorbit.com, djwong@kernel.org Cc: john.g.garry@oracle.com, ritesh.list@gmail.com, kbusch@kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org, gost.dev@samsung.com, p.raghav@samsung.com, da.gomez@samsung.com, kernel@pankajraghav.com, mcgrof@kernel.org Subject: [RFC v2 09/11] block/bdev: lift block size restrictions and use common definition Date: Fri, 13 Dec 2024 19:10:47 -0800 Message-ID: <20241214031050.1337920-10-mcgrof@kernel.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241214031050.1337920-1-mcgrof@kernel.org> References: <20241214031050.1337920-1-mcgrof@kernel.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: Luis Chamberlain We now can support blocksizes larger than PAGE_SIZE, so lift the restriction up to the max supported page cache order and just bake this into a common helper used by the block layer. We bound ourselves to 64k as a sensible limit. The hard limit, however is 1 << (PAGE_SHIFT + MAX_PAGECACHE_ORDER). Signed-off-by: Luis Chamberlain Reviewed-by: Hannes Reinecke Reviewed-by: John Garry --- block/bdev.c | 5 ++--- include/linux/blkdev.h | 11 ++++++++++- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/block/bdev.c b/block/bdev.c index 167d82b46781..b57dc4bff81b 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -157,8 +157,7 @@ int set_blocksize(struct file *file, int size) struct inode *inode = file->f_mapping->host; struct block_device *bdev = I_BDEV(inode); - /* Size must be a power of two, and between 512 and PAGE_SIZE */ - if (size > PAGE_SIZE || size < 512 || !is_power_of_2(size)) + if (blk_validate_block_size(size)) return -EINVAL; /* Size cannot be smaller than the size supported by the device */ @@ -185,7 +184,7 @@ int sb_set_blocksize(struct super_block *sb, int size) if (set_blocksize(sb->s_bdev_file, size)) return 0; /* If we get here, we know size is power of two - * and it's value is between 512 and PAGE_SIZE */ + * and its value is larger than 512 */ sb->s_blocksize = size; sb->s_blocksize_bits = blksize_bits(size); return sb->s_blocksize; diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 08a727b40816..a7303a55ed2a 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -269,10 +269,19 @@ static inline dev_t disk_devt(struct gendisk *disk) return MKDEV(disk->major, disk->first_minor); } +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +/* + * The hard limit is (1 << (PAGE_SHIFT + MAX_PAGECACHE_ORDER). + */ +#define BLK_MAX_BLOCK_SIZE (SZ_64K) +#else +#define BLK_MAX_BLOCK_SIZE (PAGE_SIZE) +#endif + /* blk_validate_limits() validates bsize, so drivers don't usually need to */ static inline int blk_validate_block_size(unsigned long bsize) { - if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize)) + if (bsize < 512 || bsize > BLK_MAX_BLOCK_SIZE || !is_power_of_2(bsize)) return -EINVAL; return 0;